萃取抽提C10重芳烃中均四甲苯的萃取剂筛选.pdf

石油化工
2010年第39卷第4期
PETROCHEMICAL TECHNOLOGY
萃取抽提C重芳烃中均四甲苯的萃取剂筛选
黄杰军',程莹莹',顾正桂2,周永兵
(1.南京师范大学江苏省萃取分离工程技术研究中心,江苏南京210097;
2.江苏沿江化工资源开发研究院,江苏南京210097)
[摘要]采用萃取精馏法分离C10重芳烃中的关键组分,根据萃取剂选择条件,初步确定选用环丁碱、邻苯二甲酸二甲酯、邻苯
甲酸二丁酯、邻苯二甲酸二辛、甘油和二苯胺为萃取剂;建立了汽液相平衡测定装置,测定了关键组分间的相对挥发度,确定邻
苯二甲酸二辛豳为萃取剂;用 Aspen Plus软件进行模拟计算,在较佳模拟条件(T1塔板数为50块、原料进料位置为第18块塔板
回流比为5:12塔板数为40块、侧线进料位置为第20块塔板、萃取剂进料位置为第10块塔板、萃取比(萃取剂与进料的体积比
为3.0、回流比为5;原料进料量为0.1L/h)下,可分别获得质量分数为60.3%和37.4%的均四甲苯和偏四甲苯,为均四甲苯结晶
和偏四甲苯异构化提供原料。
「关键词]碳十重芳烃;萃取精馏;萃取剂; Aspen Plus软件;均四甲苯;偏四甲苯;异构化
[文章编号」1000-8144(2010)04-0401-05
中图分类号]TQ073.2
文献标识码
Screening of Extractant for Extractive Distillation of Durene from Co Heavy Aromatics
Huang Jiejun, Cheng Yingying, Gu Zhenggui.2, Zhou Yongbing
(I Extraction En neering Te ical Research enter of Nanjing, Nanjing Normal University, Nanjing Jiangsu 210097, China
2. Research Institute for Chemical Resources Exploitation of Jiangsu Province, Nanjing Jiangsu 210097, China)
Abstract
extraction distillation process for separations of both durene and isodurene from C
heavy aromatics was developed. Relative volatilities of main components in the C heavy aromatics in
different extractants, namely sulfolane, dimethyl phthalate, dibutyl phthalate, dioctyl phthalate and
glycerol, diphenylamine, were determined in a vapor-liquid equilibrium device to select appropriate
extractant for the extraction distillation process. Results showed that dioctyl phthalate was the best
Simulation calculation of the extraction distillation of the C heavy aromatics was carried out. the
optimal operation conditions were obtained and the process parameters of tower tray were designed by
means of the Aspen Plus software. Under the optimal operation conditions: theoretical tray number of
Tl 50, feed tray 1 th, reflux ratio 5; theoretical tray number of T2 40, feed tray 20th, extractive feed
tray 1oth, volume ratio of the extractant to feed 3.0, reflux ratio 5; and feed flowrate at inlet 0. 1 L/h
60. 3%( mass fraction of durene as raw material of crystallization and 37. 4%(mass fraction) of
isodurene as raw material of isomerization could be obtained
Keywords] Co heavy aromatics; extractive distillation; extractant; Aspen Plus software; durene
1sodurene. Isomerization
Cio重芳烃是石油和煤加工过程中的副产物,主含量较高、有利用价值的组分是均四甲苯、二乙苯
要来源于炼油厂催化重幣装置和涤纶原料厂宽馏分蕊系物质和高芳溶剂油?。C0重芳烃中一些组
催化重整装置,少部分米源于乙烯装置副产的乙烯焦分的沸点非常接近,分离困难,所以用普通精馏法
油和煤高温炼焦副产等其他生产装置。C0重芳烃不仅需要的理论塔板数多且耗能高,而萃取精馏法
是一种重要的化工原料,组成复杂,组分多达150
种时,虽然各组分的含量随其生产工艺参数及实际操
[收稿日期】2009-11-10:[修改稿日期]2010-0l-25。
作情况的变化而变化,但其主要组分及含量基本稳
[作者简介]黄杰军(1986一),男,江苏省扬州市人,硕士生。联系
人:顾正桂,电话025-83598233,电邮guzhengguit@ninu.edu.cn
定,且各主要生产企业已制定了相应的企业标准,为[基金项目」中国石化扬子石油化工股份有限公司科研基金项目
C重芳烃资源的综合利用创造了有利条件。其中,(408017)